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. 2022 Nov 22;10:933075. doi: 10.3389/fpubh.2022.933075

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Copyright © 2022 Wang, Ma, Ding, Xu, Zhang, Zhang, Dai, Tao, Wang, Cheng, He, Du, Feng, Yang, Wang, Xie, Xu, Liu, Chen, Li, Wu, Ye, Yang, Fan, Zhou and Ding.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The distribution of the serial interval. The best-fitting distribution of the serial interval by Weibull distributions based on 72 transmission pairs. Negative serial intervals, which signify pre-symptomatic transmission, were also included in the analysis.